Camera / Studio converter intercom - strange behaviour.

Anyone else experienced that microphone on the camera converter stops working when video signal is detected?
Everything else works fine and the audio from the Studio Converter to the Camera Converter is ( a bit distorted but) OKat all times.
The other way from Camera to Studio Converter only works when the video feed is disconnected...
Very frustrationg.
Been testing with diferent Camera Converters, different headsets, 1080i50 and 720p50. I have also restarted the Studio Converter but nothing seems to solve the problem.

Seems that the problem didn't occur with a different camera.
Sony EVI-H100S = problem
JVC GY-HM750E = working

Are there different versions of SDI in 1080i50?
Hm...

-Ö-

Hello,
Same thing with Sony HD1000E with HDMI:
- Problem in SD 576i (microphone on the camera converter stops working)
- No problem in HD 1080i mode.